JBoss Seam @In attribute requires non-null value[Resolvido]

Name("genericDao")
public class GenericDaoImpl<T> implements GenericDao<T> {

    @In(create = true)
    protected EntityManager entityManager;

    public T find(Class<T> c, Object id) {
        return entityManager.find(c, id);
    }

    public T merge(T obj) {
        return entityManager.merge(obj);
    }

    public void persist(T obj) {
        entityManager.persist(obj);
    }

    public void remove(T obj) {
        entityManager.remove(obj);
    }
}

@Name("availabilityDao")
public class AvailabilityDaoImpl extends GenericDaoImpl<Availability> implements AvailabilityDao {
}

@Name("availabilityService")
public class AvailabilityService extends BaseService {

    @In(create = true)
    private AvailabilityDao availabilityDao;

    public void persist(Availability obj) {
        availabilityDao.persist(obj);
    }

    public List<Availability> findBy(Long idUser) {
        return availabilityDao.findBy(idUser);
    }
}

@Name("availabilityAction")
@Restrict("#{s:hasRole('PAID_USER') || s:hasRole('ADMIN')}")
public class AvailabilityAction {

    @In(create = true)
    private AvailabilityService availabilityService;
    @In
    private User user;

    @Out(required = false)
    private Availability availability;

    public void save(Availability availability) {
        availabilityService.persist(availability);
    }

    public void renew() {
        availability= new Availability();
    }

    public void select(Availability availability) {
        this.availability = availability == null ? new Availability() : availability;
    }

    public List<Availability> getAvailabilities() {
        return availabilityService.findBy(user.getId());
    }
}